/*
 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * questions.
 */

/*
 * @test
 * @bug 8151486
 * @summary Call Class.forName() on the system classloader from a class loaded
 *          from a custom classloader, using the current class's protection domain.
 * @library /test/lib
 * @build jdk.test.lib.Utils
 *        jdk.test.lib.util.JarUtils
 * @build ClassForName ProtectionDomainCacheTest
 * @run main/othervm/policy=test.policy -XX:+UnlockDiagnosticVMOptions -XX:VerifySubSet=dictionary -XX:+VerifyAfterGC -Xlog:gc+verify=debug,protectiondomain=trace,class+unload:gc.log -Djava.security.manager ProtectionDomainCacheTest
 */

import java.net.URL;
import java.net.URLClassLoader;
import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.List;
import jdk.test.lib.Utils;
import jdk.test.lib.util.JarUtils;

/*
 * Create .jar, load ClassForName from .jar using a URLClassLoader
 */
public class ProtectionDomainCacheTest {
    private static final long TIMEOUT = (long)(5000.0 * Utils.TIMEOUT_FACTOR);
    private static final String TESTCLASSES = System.getProperty("test.classes", ".");
    private static final String CLASSFILENAME = "ClassForName.class";

    // Use a new classloader to load the ClassForName class.
    public static void loadAndRun(Path jarFilePath)
            throws Exception {
        ClassLoader classLoader = new URLClassLoader(
                new URL[]{jarFilePath.toUri().toURL()}) {
            @Override public String toString() { return "LeakedClassLoader"; }
        };

        Class<?> loadClass = Class.forName("ClassForName", true, classLoader);
        loadClass.newInstance();

        System.out.println("returning : " + classLoader);
    }

    public static void main(final String[] args) throws Exception {
        // Create a temporary .jar file containing ClassForName.class
        Path testClassesDir = Paths.get(TESTCLASSES);
        Path jarFilePath = Files.createTempFile("cfn", ".jar");
        JarUtils.createJarFile(jarFilePath, testClassesDir, CLASSFILENAME);
        jarFilePath.toFile().deleteOnExit();

        // Remove the ClassForName.class file that jtreg built, to make sure
        // we're loading from the tmp .jar
        Path classFile = FileSystems.getDefault().getPath(TESTCLASSES,
                                                          CLASSFILENAME);
        Files.delete(classFile);

        loadAndRun(jarFilePath);

        // Give the GC a chance to unload protection domains
        for (int i = 0; i < 100; i++) {
            System.gc();
        }
        System.out.println("All Classloaders and protection domain cache entries successfully unloaded");
    }
}
